Asymptotic integration of boundary-value problems for the singularly perturbed differential-algebraic systems in the critical case. Neliniini Kolyvannya, [S. l.], v. 29, n. 1, p. 18–43, 2026. DOI: 10.3842/nosc.v29i1.1543. Disponível em: https://nosc.imath.kiev.ua/index.php/nosc/article/view/1214. Acesso em: 14 sep. 2026.